Rocker shaft bearing for looms



Aug. 15, 1933. c. D. BROWN 1,922,026

ROCKER SHAFT BEARING FOR LOOMS Filed Sept. 2. 1952 INVENTOR.

CAEL D. BEow/v.

BYM?M ATTORNEY.

w/ T/vfss CL INTO/v6 Coal/EN.

Patented Aug. 15, 1933 Parser ROCKER SHAFT BEARING FOR LOOMS Carl D. Brown, Hopedale, Mass, assignor to Draper Corporation, Hopedale, Mass., a Corporation of Maine Application September 2, 1932 Serial No. 631,543

2 Claims. (01. see-a1) The present invention relates to rocker-shaft bearings for looms, and has more particular reference to a novel and improved means for pre venting wear of the rocker shaft proper.

It is a common expedient in the art to provide the rocker shaft, Where it extends through the loom-side, with a removable and replaceable bushing journalled in a rocker shaft box and constrained to oscillate with the rocker shaft. By this means, the wear occasioned by continued oscillation of the rocker shaft is confined to the bushing and the box, which are cheaply replaced, and no wear occurs on the rocker shaft, which is more expensive than the bushing and box, and much more diificult to replace.

It is the principal object of my invention to provide, in a rocker shaft bearing of the aforementioned type, a novel form of bushing, with new and approved means for constraining the same to move with the rocker shaft, which construction shall be simple in form and efficient in operation.

A further object of my invention is to provide such a bearing in which the bushing and constraining means shall be so constructed as to readily permit the adjustment of the bushing about the rocker shaft, relative to the box, so as to compensate for wear, and thus prolong the life of the parts.

Referring to the drawing:

Fig. 1 is a perspective view of a portion of a loom, showing the rocker shaft and the preferred form of my improved bearing construction;

Fig. 2 is a detail View, in perspective, of the rocker shaft box;

Fig. 3 is a detail, likewise in perspective, of the rocker shaft bushing shown in Fig. 1; and

Fig. 4 is a detail, also in perspective, of the locking member shown in Fig. 1.

The loom frame may be of any suitable usual construction, and I have accordingly illustrated, as representative thereof, only the lower portion of the right-hand loom-side 1. The rocker shaft 2 is supported by the loom-sides in a manner hereinafter described, and supports the layswords 3 and. parallel 4, the latter forming a guide for the shoe 5 fixed on the lower end of the picker stick 6. The rocker-shaft extends through the loom-side, and the lay-sword 3 is fixed to the rocker-shaft inside the loom-side, while the parallel 4 is fixed to the outer end of the rocker shaft, outside of the loom-side, as is usual in the type of loom illustrated.

A rocker shaft box 7 is bolted to the loom-side, as by bolts 8. The box '7 is provided with a cylin- Journalled within the sleeve 9 of the rocker shaft box is a novel form of bushing 12. This bushing, which may be of cast iron, steel, or any other suitable material, is cylindrical in form and is provided at its outer end with a flange or head 13 of larger diameter than the body portion of the bushing. The bushing is positioned in the box 7 with its headed end 13 outside the loom-side and immediately adjacent the parallel. A plurality of circumferentially spaced notches 14 are formed in the head 13, three such notches being shown.

The sleeve 15 of the parallel is fixed to the outer end of the rocker shaft, as by means of a set-screw 16. The bushing 12 is, in accordance with my invention constrained to move with the parallel. Since the parallel is, in turn, fixed to the rocker shaft the bushing will turn with the rocker shaft and all wear will thus be confined to the outer surface of the bushing and the inner surface of the sleeve 9, none occurring on the rocker shaft. To this end, I have provided a locking member, in the form of a spring clip 17, secured to the parallel sleeve 15 and interengaging with the bushing. The clip 17 is conveniently bolted to the parallel by means of check nut 13 and the aforementioned set-screw 16, whereby the latter serves a double purpose.

The clip 17, formed of spring steel or other suitable material, is comprised of a bowed body portion 19 and a reduced extension 20, the latter being engageable with any of the notches 14 in the head of the bushing. Rotative adjustment of the bushing, to present a new wearing surface to the bottom of the rocker shaft box where most of the wear occurs, is readily accomplished upon the loosening of nut 18 to thereby release the locking member from engagement with the bushing, after which the locking member may be engaged with a different one of the notches 14 in the bushing.

The advantages of the present construction are apparent, but may be briefly mentioned. The bushing 12 and clip 17 are simple, cheap, and thoroughly dependable. Since the bushing may be adjusted to present new wearing surfaces to the bottom of the box its period of utility is considerably prolonged. Securing the bushing to the parallel enables the securing means to be placed outside the loom-side, where it is readily accessible for inspection and adjustment or tightening. Also, the spring clip may, through its spring action, be so firmly engaged with the notch in the bushing as to efiectively prevent any lost motion, which would be attended by wear on both the notch and the surface of the rocker shaft.

It is, of course, to be understood that the particular construction herein disclosed is but one of the forms in which my invention may be embodied, the true scope of the invention being defined in the appended claims.

I claim:

1. In combination, a loom-side, a lay rocker shaft extending through the loom-side, a lay sword secured to the rocker shaft inside the loomside, a parallel fixed to the outer end of the rocker shaft outside the loom-side, a rocker shaft box carried by the loom-side between the laysword and the parallel, a headed bushing journalled in the rocker shaft box and having its headed end outside the loom-side and adjacent the parallel, the rocker shaft extending through the said bushing, and a locking member comprised of a spring clip secured to the parallel and engaging a notch in the head of the bushing to constrain the latter to move with the parallel.

2. In combination, a loom-side, a lay rocker shaft extending through the loom-side, a laysWord secured to the rocker shaft inside the loomside, a parallel fixed to the outer end of the rocker shaft outside the loom-side, a rocker shaft box carried by the loom-side between the laysword and the parallel, a headed bushing journalled in the rocker shaft box and having its headed end outside the loom-side and adjacent the parallel, the rocker shaft extending through the said bushing, the head of the bushing being provided with a plurality of circumferentially spaced notches, and a locking member comprised of a spring clip bolted to the parallel and engaging one of the notches in the head of the bushing to constrain the latter to move with the parallel, the bushing being rotatively adjustable relative to the box by engaging the said clip with different of the said notches in the head of the bushing.

CARL D. BROWN. 

